How does the pneumatic rod increase the pressure?

The method for increase that pressure through the pneumatic rod comprises the follow steps:

1. The spring pushes the diaphragm downward so that the plunger contacts the valve, closing the passage between the gas storage tank and the pressure reducing valve, and at the same time, the plunger pushes the valve downward away from the valve seat.

2. When the exhaust passage is opened, the compressed air in the pipeline above the pressure relief valve will be discharged from the exhaust port of the air pressure regulating valve, the pressure relief valve stem will be reset under the action of the spring, and the air inlet valve will start to seal.